On Wednesday, January 22, 2020 at 1:46:35 PM UTC-7, John Clark wrote: > > On Wed, Jan 22, 2020 at 3:34 PM Lawrence Crowell <[email protected] > <javascript:>> wrote: > > > For an accelerated expansion of the sphere there is a cosmological >> horizon that one can't cross. in other words, the sphere will keep >> expanding faster than you can ever go. Think of the scene in the movie "*The >> Shining*" with Jack Nicholson where the hotel hallway telescoped away >> faster than he could run. >> > > OK. But in that case in what sense could it be said that such a universe > is "closed"? It seems to me if the expansion is accelerating I'll never get > back to where I started no matter how far I go even if it's spherically > curved as you say. > > John K Clark >
*If the universe is a hyper-sphere, it's finite in volume regardless of whether light returns or not. So maybe your definition of "closed" is not right. AG* > > > > > >> >> -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/2a9fe83a-b5e3-48d5-9997-6032621904eb%40googlegroups.com.
